#include <iostream>

using namespace std;

int main(int argc, char const *argv[])
{
    int a, b, c;
    cin >> a >> b >> c;

    // 三角形基本判定
    if(a+b<=c || b+c<=a || a+c<=b)
    {
        cout << "no" << endl;
        return 0;
    }

    // 直角三角形判定
    if( ((a*a + b*b) == c*c) ||
        ((a*a + c*c) == b*b) ||
        ((b*b + c*c) == a*a) )
    {
        cout << "yes" << endl;
    }
    else
        cout << "no" << endl; 

    return 0;
}